This week, within the space of 48 hours, the United States elected its next president and the Chinese Communist Party will convene in Beijing to begin the formal handover of power to the next generation of its leadership. To many, this pivotal transition point for the world’s two largest economies holds out the promise of deliverance from the specter that’s been haunting decision-making ever since the collapse of Lehman Brothers four years ago: the specter of “uncertainty.” If there is a phrase that CEOs, politicians and investors use more often to explain everything from poor performance to halting growth to lack of investment and a reluctance to boost hiring, it might just be its near-cousin, “volatility.”